body {
  overflow-x: hidden;
}
.header {
  font-size: 16px;
  width: 100%;
  height: 100px;
  line-height: 100px;
  background-color: #fff;
  background-image: url('Https://www.shejiyuan.com/Public/images/exam_header.png');
}
.header b {
  margin-left: 20px;
}
.picture {
  height: 90px;
  margin-top: 0px;
  margin-left: 25px;
}

.header-right {
  float: right;
  margin-top: 0px;
  margin-right: 25px;
  overflow: hidden;
}
.countdown-container {
  position: absolute;
  top: 0px;
  width: 300px;
  right: 150px;
}
.countdown {
  position: absolute;
  top: 35px;
  right: 0px;
}

.question-button,
.question-button-marked,.question-button-finish,.question-button-not-finish {
  width: 35px;
  height: 25px;
  color: #555;
  text-align: center;
  line-height: 25px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: 0.3s;
  -o-transition: 0.3s;
  -ms-transition: 0.3s;
  -moz-transition: 0.3s;
  -webkit-transition: 0.3s;
}

.question-button:hover,
.question-button-marked:hover ,.question-button-finish:hover,.question-button-not-finish:hover{
  opacity: 0.7;
}
.question-button {
  background-color: #ccc;
}
.question-button-marked {
  background-color: green;
}
.question-button-finish{
    background-color: #ff4d4f;
}
.question-button-not-finish{
  background-color: #fde100;
}
.tips{
  margin-top: 20px;
}
.tips-item1,
.tips-item2,
.tips-item3,
.tips-item4 {
  width: 35px;
  height: 35px;
  color: #fff;
  text-align: center;
  line-height: 35px;
}
.tips-item1 {
  background-color: #fde100;
  color: #555;
}
.tips-item2 {
  background-color: #ff4d4f;
}
.tips-item3 {
  background-color: #1890ff;
}
.tips-item4 {
  background-color: green;
}

.question-content {
  font-size: 18px;
  font-weight: bold;
}
.question-answer-item {
  margin-top: 10px;
}

.submit-button{
  position: absolute;
  bottom: 0;
  left: 50%;
  margin-left: -50px;
  width: 100px;
  bottom: 20px;
}
.result-back{
  position: absolute;
  left: 20px;
  cursor: pointer;
}

.result-count p:nth-child(2){
  font-size: 16px;
  border-top: 1px solid #f60;
  width: 80%;
  margin:auto;
  padding-top: 5px;
  margin-top: 5px;
}

.result-show{
  margin: auto;
  position: relative;
}
.check-button,.wrong-button{
  position: absolute;
  right: 50px;
  top: 15px;
  width: 90px;
}
.wrong-button{
  top: 70px;
}
.grade-card{
  display: flex;
  justify-content: center;
  margin-top: 20px;
  text-align: center;
  font-size: 18px;
}
.right-grade,.wrong-grade{
  margin-right: 20px;
  padding-right: 20px;
  border-right: 1px solid #ddd;
}
.right-grade p{
  color: #52c41a;
}
.wrong-grade p{
  color: #ff4d4f;
}
.unfinished-grade p{
  color: #888
}